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HTML

              
                <div class="first-wrapper">
  <div class="square-loader">
    <div class="square first_square"></div>
    <div class="square second_square"></div>
    <div class="square third_square"></div>
  </div> 
</div>


<div class="second-wrapper">
  <div class="circle-loader">
      <div class="circle circle_four"></div>
      <div class="circle circle_three"></div>
      <div class="circle circle_two"></div>
      <div class="circle circle_one"></div>
  </div>
</div>
              
            
!

CSS

              
                html, body {
	width: 100%;
  height: 100%;
  margin: 0px;
	padding: 0px;
	overflow: hidden;
  
  display: flex;
}

div[class*=wrapper] {
	height: 100%;
	width: 50%;

  display: flex;
  justify-content: center;
  align-items: center;  
}
div[class*=loader] {
  position: relative;
  width: 200px;
  height: 200px;
}
/* 
=======================
    Square Preloader
=======================
*/
.first-wrapper {
	background-color: #0EB1D2;
}

.square {
	width: 50px;
	height: 50px;
	background-color: rgba(255,255,255,0);
	margin-right: auto;
	margin-left: auto;
	border: 2px solid #fff;
	left: 73px;
	top: 73px;
	position: absolute;
}

.square-loader {
  transform: rotate(45deg);
}

.first_square {
  animation: first_square_animate 1s infinite ease-in-out;
}
.second_square {
	animation: second_square 1s forwards, 
             second_square_animate 1s infinite ease-in-out;
}	
.third_square {
	animation: third_square 1s forwards, 
             third_square_animate 1s infinite ease-in-out;
}	
		
@keyframes second_square {
  100% { width: 100px; height:100px; left: 48px; top: 48px; }
}

@keyframes third_square {
  100% { width: 150px; height:150px; left: 23px; top: 23px;}
}

@keyframes first_square_animate {
  0%   { transform: perspective(100px) rotateX(0deg) rotateY(0deg);} 
  50%  { transform: perspective(100px) rotateX(-180deg) rotateY(0deg); }
  100% { transform: perspective(100px) rotateX(-180deg) rotateY(-180deg); }
}

@keyframes second_square_animate {
  0%   { transform: perspective(200px) rotateX(0deg) rotateY(0deg); } 
  50%  { transform: perspective(200px) rotateX(180deg) rotateY(0deg); } 
  100% { transform: perspective(200px) rotateX(180deg) rotateY(180deg); }
}

@keyframes third_square_animate {
  0%   { transform: perspective(300px) rotateX(0deg) rotateY(0deg); } 
  50%  { transform: perspective(300px) rotateX(-180deg) rotateY(0deg); } 
  100% { transform: perspective(300px) rotateX(-180deg) rotateY(-180deg); }
}


/* 
=======================
   Circle Preloader
=======================
*/
.second-wrapper {
	background-color: #17607d;
}

.circle-loader {
  position: relative;
}

.circle {
	border-radius: 50% 50% 50% 50%;
	position: absolute;
	border-top: 2px solid #fff;
	border-bottom: 2px solid transparent;
	border-left:  2px solid #fff;
	border-right: 2px solid transparent;
	animation: animate 2s infinite;	
}

.circle_one {
	left: 75px;
	top: 75px;
	width: 50px;
	height: 50px;
}
							
.circle_two {
	left: 65px;
	top: 65px;
	width: 70px;
	height: 70px;
  animation-delay: 0.2s;
}
		
.circle_three {
	left: 55px;
	top: 55px;
	width: 90px;
	height: 90px;
  animation-delay: 0.4s;
}

.circle_four {
	left: 45px;
	top: 45px;
	width: 110px;
	height: 110px;
  animation-delay: 0.6s;
}	

@keyframes animate {
  50% { transform: rotate(360deg) scale(0.8); }	
}

              
            
!

JS

              
                
              
            
!
999px

Console